Sheet-trimming machine



Nov. 3, 1925. 1,560,452

G. F. WIELANDT SHEET TRIMMING MACHINE M woll/M414 Nov. 3, 1925.

G. F. WIELANDT SHEET TRIMMING MACHINE 5 Sheets-Sheet 2 Filed June 23, 1923 l anne/Moz Nav. 3I 1925.

G. F. WIELANDT SHEET TRIMMING MACHINE Filed June 23. 1925 5 Sheets-Sheet v:s

Nav. 3, 1925- G. F. WIELANDT SHEET "rannuua CHINE Filed June 2s, 1925 5 Sheets-Sheet 4 aww/toc @gnam Q/@M WNW 5 Sheets-Sheet 5 Filed June 25, 1923 @www Patented Nov. 3, 1925.

UNITED STATES PATENT ortica.

GEORGE FREDERICK WIELANDT, OF CANTON, OHIO, .ASSIGNOR TO UNITED ALLOY STEEL CORPORATION, 0F CANTON, OHIO', A CORPORATION OF NEW YORK.

SHEET-TRIMMING MACHINE.

Application filed AJune 23, 1923. Serial No. 647,216.

To all whom 'it may concern.'

Be it known that I, GEORGE FREDERICK VIELANDT, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Sheet- Trimming Machines, of which the following is a specification.

The invention relates to machines for trimming the ends of metal sheets; and the object of the improvement is to provide an automatic machine which will truly trim each end of the sheet, and ma be adjusted for trimming sheets of di erent predetermined lengths.

The manufacture of expanded metal lath or the like frequently leaves the sheets with ragged or irregular ends, and when such a sheet is made with unexpanded ribs longitudinally located between expanded zones, it may be desirable, if not necessary, to square the ends of the sheets by trimming off protruding portions resulting from the expanding operations.

The present invention involves the use of a shearing head with parallel shearing blades operated between parallel shearing dies, a sliding pin clutch operating the shearing head, means for feeding a sheet to and from the machine, with a trip arm actuated by the forward end of the sheet for trimming the same end by the forward shearing blade, and simultaneously trimming the rear end of the preceding sheet to a predetermined length by the rear shearing blade.

A referred embodiment of the machine is illustrated in the accompanying drawings forming part hereof, in which- Figure 1 is a plai view, in two sections, of the trimming machine;

Fig. 2, an enlarged side elevation of the operating mechanism;

Fig. 3, an enlarged plan of the operating mechanism;

Fig. 4, a side elevation section of the operating mechanism, on line VI V, Fig. 3;

Fig. 5, a longitudinal section of the trimming mechanism, on line V-V, Fig. l;

Fig. 6, a cross section on line VI-Vl, Figs. 2 and 3, showing the trimming mechanism in front elevation;

Fig. 7, a cross section on line VI-ViL Fig. 2;

Fig. 8, a fragmentary perspective view of the rear stop arm and the adjacent guides;

Fig. 9, an inside elevation of the same;

Fig. 10, a cross section of the'same on line X-X, Fig. 9; and

Fig. 11, a fragmentary perspective View of the trip arm. 1

Simi'ar numerals refer to similar parts throughout the drawings.

The trimming mechanism includes a shearing head 1, and shearing dies 2 and 2 on opposite sides of the tread, the same being mounted between standards 3 upon a base 4. The trimming head may be operated upward and downward between the shearing dies by well known means, as a cross head 5, guides 6, a pitman 7, a crank shaft 8, a slide pin clutch 9, and a driven pulley 10, arran ed as shown in Fig. 6.

Parallel shearing blades 11 and 11 are secured on the opposite sides of the shearing head, and the edges of these blades are adapted to cooperate with the ed es of the parallel shearing dies 2 and 2 For simultaneously trimming the forward and rear ends of two sheets as they are fed through the machine.

The feed-in conveyor may include a series of pairs of disk rolls 12 and 12 driven by a gearing 13 and operating on the ribs of an expanded metal sheet 14 to feed the same into the forward side of the shearing mechanism; and these rolls may be supplemented byvparallel guides 15 in a well known manner. The feed-out conveyor' may include a series of pairs of rolls 16 driven by the gearing 17 and operating on the expanded zones of the sheet to feed the same from the slitting mechanism.

The trip arm 18 may have a trip block 19 with a roughened forward face on its lower end, and is formed or secured on the forward end of a rock sleeve 20 having another rock arm 21 on its other end; which rock sleeve 20 is mounted for rotatin and sliding entwise upon the trip sha t 22, which in turn is mounted for rotating and sliding endwise inV bearings 23 secured to the frame of the machine.

rlhe rock arm 18, normally extends downward and inward so that the trip block 19 will be in the path of one edge portion cf the sheet to be trimmed, which may be the rib along ene side of an expanded sheet;

vthe trip rearward movement;

-same shaft adjacent to ther-ear end of and a roller 24 is preferably mounted on a pivot pin extending directly inward from the end of the trip arm 18 adjacent to the inner lower side of the trip block 19.

A Weight 25 is suspended from the rock arm 21 on the rear end of the trip sleeve 20, and tends to hold the trip arm 18 in normal position with the trip block 19 in the path of the edge of the sheet, while permitting the sleeve to be rotated to swing block to one side of the same; the rotation of the sleeve by the weight being normally stopped by the engagement of the pin 26 on the rock arm 21, with a pin 27 on the hub 28 of the crank arm 29, mounted for rotating and sliding endwise upon the shaft 22 at the rear end of the trip sleeve 21, as shown in Fig. 11.

The crank arm 29 is connected by the rod 30 with a lever 31 which is fulcrumed at 32 on the side of the standard 3, which lever is normally pulled downward by the spring 32 connected with the standard 3, and is provided with a roller 33 riding on the periphery of the cam 34 on one end of the crank shaft 8.

A ange 36 is secured on the trip shaft 22 at a convenient place in front of the standard of the shearing mechanism, in rear of which flange is located the inner end of a transverse bar 37, secured to the upper end of the lever 38, the lower end of which lever is secured topa transverse rock shaft 39, on the other end of which shaft is secured a crank arm 40, which is connected the bar 41, the crank shaft 42 and the b br 43 with the clutch 9, for actuating the same; the parts being-so arranged that' a of the forward trip shaft 22 will cause the flange 36 to impinge the bar 37 and move the same rearward for actuating the clutch to give the crank shaft one rotation, which moves the shearing head downward for a shearing operation and thence upward into normal position.

The rearward movement of the trip shaft 22 is resisted by the coiled compression spring 44 .in the tubular guide 45 extended from the rear end of the shaft, and the piston 46 bearing gainst the spring in the rear end of the tubular guide; which piston is secured on the forward end of a-rod 47 secured at its rear end to a bearing on the fra-Ine of the feed-out conveyor.

A collar 48 is secured to the forward tri shaft 22 adjacent to the rear side of the hub of the crank arm 29 thereonand at an interval in front of one of the -shaft bearings 23, and another collar 49 is secured to the the same bearing; which collars serve as stops to limit the longitudinal movement of the shaft, and are so located that a forward movement of the shaft caused by the action of the compression Spring 44 will be stopped fconveyor.

with the trip block 19 in normal position for actuating a trimming of the forward end of a sheet; and a rearward movement of the shaft will be stopped just as soon as the trip mechanism has performed its actuating operation.

Most of the mechanism thus far described is concerned primarily with the operation of trimming the forward end of a sheet delivered to the trimming mechanism by the feed-in conveyor. As the forward end of the sheet travels u on and over the forward shearing die 2, it is preferably directed and held downward upon the same by suitable guides 50; and as the sheet advances, one corner thereof impinges the trip block 19 and acting through the trip sleeve 2O and the crank hub 28 against the collar 48, moves the forward trip shaft rearward so that the flange 36 on its forward end impinges and moves the bar 37 rearward, which vactuates the clutch and causes the shearing head 1 to descend and trim the advance end of the sheet by the co-operation of the forward shearing blade 11 and the forward shearing die 2;` the sheet being stopped during the shearing operation, by the contact of the collar 48 with the forward end of the bearing stopping the feed-in rolls sheets.

The sheared off end of the sheet falls downward into the base of the machine, and the descending trimming head impinges the inner side of the trip arm 18, thereby deflecting the trip block 19 outward to clear the side of the sheet by a rotation of the trip sleeve 20 upon the shaft 22. Durin the upward operation of the shearing hea the cam 34 acts upon the roller 33 to raise the lever 31, the connecting bar 30 and the crank arm 39, to rotate the trip sleeve and hold the trip arm 18 and block 19 clear of the side of the sheet; whereupon the sheet is promptly moved forward by action of the feed-in rolls and passes on to the feed-out 23, during which 12 slide upon the J ust as soon as the trip block 18 has been swung outward to clear the edge of the sheet, the trip bar 22 and the tripping device mounted thereon, are romptly. moved forward into normal position by action of the compression spring 44, and when the sheet moves rearward, the roller 24 preferably rides against the edge of the sheet for holding the trip block and trip arm.clear of the same. Just as soonas the rear end of the sheet has passed beyond the trip arm, the same swings inward into normal position by action of the weight 25. v

As the sheet proceeds rearward, its forward end is guided on to the rear shearing die 2 by means of an inclined plate guide 51 mounted on the upper ends of the supporting bars 52, operating in upright tubular guides 53 and having heads 54 on the lower ends secured on the ends of the transverse bar 55 resting on the fingers 56 eX- tending forward from the rock shaft 57 supported in bearings 58 and provided with an arm 59 extending rearward, which arm is normally held downward by the spring 60, thereby holding the inclined guide plate 51 upward in proper position for directing the end of the sheet on to the rear shearing die 2.

Guide bars 61 are preferably provided at the forward end of the feed-out conveyor for holding the sheet down upon the rear shearing die; and as the sheet moves rearward, it is engaged by the feed-out rolls 16, and conveyed away from the shearing mechanism.

The stop arm 62 is secured upon the shaft 63, which is rotatable in bearings 64 and 6l mounted on the frame of the feed-out conveyor.

Endwise movement of the shaft 63 is prevented by means of the collars 65 which are fixed upon the shaft on opposite sides of the bearing 64, and upon its rear end is secured a gear rack 66 meshing with a gear pinion 67 on the rear end of the trip shaft 22, so arranged that the shaft 22 can move endwise with reference to the shaft 61, while a rotation of the one shaft will be communicated to the other.

The inner end of the stop arm 62 is curved downward to form the stop plate 68 normally resting upon the bottom of the rear feed-out conveyor in the path of the edge portion of the sheet.

An angle plate 72 is preferably provided, having its lower flange secured to the bottom of the feed-out conveyor in front of the stop arm 62 and its upright plate 72 curved at its forward end to form a guide for the edge of the sheet. Upon this upright flange is slidably mounted an angle plate with its overlapping flange 73 secured by bolts 74 through slots 75, permitting a limited endwise movement; and its other iange 76 is provided with an upright tongue 77 on its forward end which is connected to the stop arm 62 by a bar 78, and its forward end is deflected downward to form a support, to which is connected the rear end of a guide plate 80 having its forward end curved upward in rear of the upright tongue 77, thereby forming an upper guide for the edge portion of the sheet.

As the sheet is moved rearward by the feed-out conveyor, the corner or edge portion of the advance end impinges the stop plate 68, stopping the sheet with its untrimmed rear end projecting over the die 2.

When the forward end of the next succeeding sheet impinges the trip block 19, the clutch is again operated as above described, causing the shearing head to de'- scend, trimming the advance end of the second sheet by the co-operation of the forward shearing blade 11 and the forward shearing die 2; and simultaneously trimming the rear edge of the first sheet by the co-operation of the rear shearing blade 11 and the rear shearing die 2.

As the shearing head raises, the action of the cam 34 raises the crank arm 29, which rotates the trip shaft one way and the stop shaft 63 the other way, and raises the stop arm and swings the stop plate upward out of the path of the first sheet; whereupon said sheet, which has been stopped during the shearing operation moves forward and is delivered from the machine by action of the rolls 16.

I claim:

1. A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating with the shearing edges, a stop for detaining one sheet with its rear end in position to be trimmed by one shearing edge and a trip mechanism for controlling the operation of the head arranged to be engaged by a seeond sheet. i

2. A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating` with the shearing edges, a stop for detaining one sheet with its rear end in position to be trimmed by one shearing edge, a trip mechanism for controlling the operation of the head arranged to be engaged by a second sheet, said stop being adjustable with respect to the trip mechanism.

3. A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating with shearing edges and a trip mechanism for controlling the operation of said head to simultaneously shear adjacentends of two successive sheets.

4. A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating with the shearing edges, means moving sheets over the shearing dies, mechanism operating the head to trim the adjacent ends of two successive sheets on the respective dies and a trip device for controlling the operation of said mechanism arranged to be operated by one of the sheets.

A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating with the shearing edges, means moving sheets over the shearing dies, mechanism operating the head to trim the adjacent ends o two sheets on the respective dies, a trip device for controlling the operation of said mechanism arranged to be operated by one of the sheets to trim the forward end of said sheet and the rear end of the preceding sheet.

6. A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating with the shearing edges, means moving sheets over the shearing dies, mechanism for operating the head to trim the ends of the sheets on the respective dies including a trip arm beneath said head for stopping one sheet and actuating the mechanism for trimming the forward end of said sheet and the rear end of the preceding sheet.

7. A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating with the shearin edges, means moving sheets over the s caring dies, mechanism for operating the head to trim the sheets on the respective dies includingr a stop arm arranged to be engaged by one sheet after it has passed beyond said dies for stopping the sheet and a trip arm beneath the head for stopping the next succeeding sheet and actuating the mechanism for trimming the rear end of the first sheet and the forward end of the second sheet.

8. A sheet trimming machine including a reciprocating head With shearing edges on opposite sides, shearing dies cooperating with the shearing edges, means for moving sheets over the shearing dies, mechanism for operating the head to trim the ends of the sheets on the respective dies, including a stop arm for stopping a sheet after its front end has passed beyond said dies and a trip arm operated by the succeeding sheet for operating the mechanism for trimming the rear end of the first sheet at a predetermined length.

9. A sheet trimming machine including a reciprocating head with shearing edges on opposite sides, shearing dies cooperating with the shearing edges, means for moving sheets over the shearing dies, mechanism for operating the head to trim the ends of the sheets on the respective dies, including a stop arm and longitudinally adjustable means for stopping a sheet after its front end has passed beyond said dies and a trip arm operated by the succeeding sheet for operating the mechanism for trimming the rear end of the first sheet at a predetermined length.

10. A machine for trimming metal sheets, comprising' means for frictionally feeding sheets, reciprocating cutters for simultaneously trimming the front and rear ends of Y successive sheets, a movable stop for detaining one sheet in position to be trimmed, a yielding trip stop for detaining the succeeding sheet in position to be trimmed and means of connection between the movable stop and the trip stop.

GEORGE FREDERICK WIELANDT. 

